eraser

ink

adhesive

pen

you need to use Tide Tables

you need to use the Mariner’s Handbook

you need to use Sailing Directions 

you need to use the Nautical Almanac

you should substitute range of light to 32°36'-90S., 60°54'-18E

you have to change the position of range of light to 32°36'-90S., 60°54'-18E

you have to replace range of light to 32°36'-90S., 60°54'-18E

you can commute range of light to 32°36'-90S., 60°54'-18E

keypad

contour

position

console

button

chart

the open water is near

the end of the channel

the beginning of the channel

the open water is far away

you need to use Sailing Directions

you need to useList of Lights and Fog Signals

you need to use the Nautical Almanac

you need to use List of Radio Signals

3a2^*2a3^*b2^*-2a2^*/

3a2^*2a3^+b2^*-2a2^*/

3a2^*2a3^*2b^*-2a2^*/

3a2^*2a3^*b2*^-2a2^*/

((a+b)^2-b)/((2+a)^(1/2)-a^2)-3*a*b

((a+b)^2-b)/((2*a)^((1/2)-a^2)-3)*a*b

((a+b)^2-b)/((2*a)^(1/2)-a^2)-3*a*b

((a+b)^2-b)/(2*a)^((1/2)-a^2)-3*a*b